Left without parents, having gone through hardships and hardships, Kasym ends up in a boarding school, where he learns true friendship and becomes a marksman. Growing up, he falls in love, goes through exploits and betrayal during the Great Patriotic War. A "thread" from the past helps him to keep a person in himself, which connects him with the roots of the family and the values of his ancestors.

Four young friends go on a picnic by a magnificent mountain lake. A carefree vacation, enjoying nature, the love intertwining of the characters — everything pales before the tragedy that suddenly unfolded.